Products
Home /

Spherical Lens

/Positive Meniscus Lenses And Negative Meniscus Lenses

Positive Meniscus Lenses And Negative Meniscus Lenses

The Positive Meniscus Lenses are a convex-concave lens, but it is thicker at the center than at the edges. They are felt polished and are used universally in the ophthalmic industry where convention dictates that lens power be specified in Diopters.

The Negative Meniscus Lenses are a convex-concave lens, but it is thinner at the center than at the edges. Otherwise description is similar to Plano Concave lenses.
  • product origin:

    China
  • shipping port:

    Fuzhou China
  • lead time:

    4 working weeks
  • payment:

    T/T Payment, Western Union
Inquiry now
  • description

1. What's the advantages of using Meniscus Lenses?


It produce a smaller focal point and fewer aberrations than a standard plano-convex lens and enhance image quality.

 

2. What is Meniscus Lens?


Meniscus lenses have two curved surfaces,convex on one side and concave on the other side. It is thicker at the center than at the edges. When a meniscus lens is combined with another lens, the focal length is shortened and the numerical aperture of the system is increased.

 

3. What's the applications of Meniscus Lens?


Negative meniscus lenses are often used for Infrared Application. These lenses are used as an alternative to other negative lenses with a greater curvature on the concave side and a smaller curvature on the convex side. 


Meniscus Lenses Meniscus Lenses


Meniscus Lens Capabilities

Material:
Grade A optical glass or Fused Silica
Dimension Tolerance:
±0.1mm(Standard), ±0.05mm(High Precision)
Center Thickness Tolerance:
±0.1mm(Standard), ±0.05mm(High Precision)
Focal Length:
±2%
Surface quality:
60/40(Standard), 20/10(High Precision)
Clear Aperture:
>85%
Surface Figure:
λ/2(Standard), λ/4(High Precision) @633nm
Centration:
3 arc minutes
Bevel:
<0.25mm×45°
Coating:
Upon requirement


Part No. Material F(mm) Φ(mm) R1(mm) R2(mm) Tc(mm) Te(mm) Fb(mm)
ULMN100254 BK7 100 25.4 33.72 90 4 2.5 97.5
ULMN125254 BK7 125 25.4 38.47 90 4 2.8 121.8
ULMN150254 BK7 150 25.4 42.52 90 4 3 146.3
ULMN175254 BK7 175 25.4 46.05 90 4 3.1 171.2
ULMN200254 BK7 200 25.4 49.03 90 3.5 2.8 197
ULMN250254 BK7 250 25.4 83.96 235 3.5 2.9 246.5
ULMN300254 BK7 300 25.4 94.08 235 3.5 3 296.3
ULMN500254 BK7 500 25.4 123.9 235 3.5 3.2 495.4
ULMN100254N BK7 -100 25.4 90 32.59 3 4.5 -99.2
ULMN125254N BK7 -125 25.4 90 37.26 3 4.2 -123.7
ULMN150254N BK7 -150 25.4 90 41.42 3 4 -149.5
ULMN175254N BK7 -175 25.4 90 44.86 3 3.8 -174.6
ULMN200254N BK7 -200 25.4 90 47.84 3 3.7 -199.6
ULMN300254N BK7 -300 25.4 235 93.13 3 3.5 -298.3
ULMN500254N BK7 -500 25.4 235 122.6 3 3.3 -496.5
ULMN600254N BK7 -600 25.4 600 204.08 3 3.2 -596.8



Send a Message
If you have any problem when using the website or our products, please write down your comments or suggestions, we will answer your questions as soon as possible!Thank you for your attention!
If you have questions or suggestions,please leave us a message,we will reply you as soon as we can!
Related Products
BK7 Ball lenses and Half Ball Lenses
Fused Silica Ball and Half-Ball Lenses
Ball Lenses are commonly used to improve signal quality in fiber coupling applications, or for use in endoscopy or bar code scanning applications. Ball Lenses feature short back focal lengths to minimize the distance needed from the Ball Lens to the optical fiber. Uni Optics offers a variety of Ball Lenses in a range of substrates for performance in the ultraviolet to the NIR.
Micro-components-Cone Lens
3mm Diameter, Aluminum Coated, Cone Lens
Cone lenses are cylindrical rod lenses with one end worked into a conical surface. The circumference of the rod is typically ground whereas the conical element is polished.
Micro-components-Rod Lenses
Micro Sizes Rod Lens
Rod Lenses are used for fiber coupling and laser diode beam shaping, lenses with a 0mm working distance are ideal for collimation of single and multi-mode optical fibers and laser diodes because the lens can be positioned and glued directly to the emission source. For focusing applications, or in instances where the lens can’t be in direct contact with the emission source, all lenses are available with a small working distance as well. UNI Optics can provide the size from Φ1~Φ15mm, quantity price and custom sizes, including variations in polished/ground surfaces, are available to OEM customers upon request.
Achromatic Lenses with AR coating at visible range
Broadband AR Coated Achromatic Lenses(Doublet Lenses)
Achromatic Lenses are used to minimize or eliminate chromatic aberration. The achromatic design also helps minimize spherical aberrations. Achromatic Lenses are ideal for a range of applications, including fluorescence microscopy, image relay, inspection, or spectroscopy. Achromatic Lenses, which are often designed by either cementing two elements together or mounting the two elements in a housing, create smaller spot sizes than comparable singlet lenses.
Crown Glass Double-Convex Lenses
MgF2 Coated Double-Convex (DCX) Lenses
Double Convex Lenses are used in image relay applications, or for imaging objects at close conjugates. Double Convex Lenses have positive focal lengths, along with two convex surfaces with equal radii. Aberrations will increase as the conjugate ratios increase. DCV Lenses are used in a range of industries or applications. Uni-Optics offers Double Convex lenses with a variety of coating options.
BK7 Plano-Convex Lenses
UV Fused Silica Plano-Convex (PCX) Lenses
A Plano-Convex (PCX) lens causes light to focus to a point,it has a positive focal length,which is ideal for light collimation or for focusing applications utilizing monochromatic illumination, in a range of industries. Uni-Optics offers PCX lenses with a variety of coating options.
Double-Concave Lenses with AR coating
VIS-NIR Coated Double-Concave (DCV) Lenses
Double Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double Concave Lenses, which have two concave surfaces, are Optical Lenses with negative focal lengths. Uni-Optics offers Double Concave lenses with a variety of coating options.
Plano-Concave Lenses
Optical Glass Plano-Concave Lenses
Plano Concave Lenses are ideal for beam expansion, light projection, or for expanding an optical system's focal length. Plano Concave Lenses, which have one concave surface, are Optical Lenses with negative focal lengths. PCV Lenses should be shaped with the plano, or flat, surface towards the desired focal plane. PCV Lenses are ideal for use in a range of applications or industries. Uni-Optics offers PCV lenses with a variety of coating options.
BK7 Plano-Convex Lenses
UV Fused Silica Plano-Convex (PCX) Lenses
A Plano-Convex (PCX) lens causes light to focus to a point,it has a positive focal length,which is ideal for light collimation or for focusing applications utilizing monochromatic illumination, in a range of industries. Uni-Optics offers PCX lenses with a variety of coating options.
CaF2 Infrerad Windows
IR Windows Calcium Fluoride CaF2 Windows

Calcium Fluoride windows and lenses for UV and IR spectrum. Custom made CaF2 windows, CaF2 lenses and wedges according customer's specifications. CaF2 windows up to 220mm diameter; CaF2 wedges, prisms and CaF2 mirrors; Excimer CaF2 optics, Raman grade CaF2 optics and etc.

Beamsplitter Penta Prisms
MgF2 Coated, Penta Prism Beamsplitter
Beamsplitter Penta Prism by adding a wedge and with partial reflective coating on one of its leaning surfaces, Penta Prism can be used as Beamsplitter. Transmission/reflection (T/R) ratio of 50/50, or others for Beamsplitter Penta Prism is available upon request.
Sapphire Crystal Windows
AR Coated Sapphire Windows
Sapphire window retains its high strength at high temperatures, has good thermal properties and excellent transparency. It is chemically resistant to common acids and alkali at temperatures up to 1000 °C as well as to HF below 300 °C . These properties encourage its wide use in hostile environments where optical transmission in the range from the vacuum ultraviolet to the near infrared is required.
Subscribe Our Newsletter
get in touch
REQUEST A FREE QUOTE
If you have any problem when using the website or our products, please write down your comments or suggestions, we will answer your questions as soon as possible!Thank you for your attention!

Copyright © UNI OPTICS CO., LTD © All Rights Reserved.

leave a message

Home

Products

COMPANY

Contact